Counterbalanced sound-box.



W. N. DENNISON. oouu'rznmmnonn serum 30!;

APPLICATION FILED Ill. 12, 1007.

Patented July 13, 1909.-

. UNITED STATES PATENT orrion WILBURN N. DENNISON, OE MERCHANTVILLE, NEW JERSEY, ASSIGNOR TO VICTOR TALKING MAOHINE COMPANY, A CORPORATION OF NEW JERSEY.

COUNTEBBALANOED SOUND-BOX.

lilo. 927,505.

Specification of Letters Patent.

Patented July 181, 1809.

Application filed March 12, 1907. Serial No. flfilflw.

dent oi the hm'ough oi lllerchantville, in the county oil: llzuuden and State of New Jersey, have invented certain new and useful lmp rovements in @ounterbalanced Soundltoxes, oi which the following is a lull, clear, and complete disclosure.

The object of my invention is to provide means for preventing heavy sound boxes or those oit' excessive weight from causing the stylus needle thereof from exerting the excessive pressure upon the record.

For a lull, clear and exact description of one term oi my invention, reference may be had the following specification and. accompanying drawings, in which lilre refercn-oe characters refer to corresponding parts.

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in the drawings Figure l, is an elevational oi my invention, showing the fragmentary portions oi the adjacent part-s oi the machine; Fig. '9; an enlarged view of my invention, showing the sound box turned hacl; on the sound conveying arm-guild Fig.

8 an enlarged end view oi the sound box turned down into its operative position on the record. X

It is sometimes customary in the art to make difierent parts of a talking machine, especially those parts which come in contact with the sound waves, of excessive proportions in order to produce a clearer tone. In some cases the sound box is 'enlar ed to such so as to cause the stylus no Is to exert too orciblc or abnormal pressure upon the record, thus destroying the revolution of the latter, or, retarding the same or doing some other damage to interfere with the open ativeness of the machine.v To obviate said disadvantages I have provided means for taking that much of the wci ht oil the sound box as the same is heavier, t an the ordinary or regular size sound box in common use, or in other words the excgsslve welght thereof.

Otherwise the peculiar construction of this device, the parts ofwthe mac in m y e c structed like those of variable designs in;

common use: Iuthe-one .haveillustrated, however, a supporting arm to attach to a cabi'netgfl, and to the upper end of the sup- 'box will cause the lever 12 to swing pivot until the'exc'esslve weight of the sound porting arm is a swinging arm 3 mounted to swing in a horizontal plane and having pivoted to its free end a ll shaped tuhe 4:, by the usualhinge 5, the free end of the ll shaped tube having mounted thereon the spring 4r. The sound hex 6, as heretofore stated is out heavy or excessive weight, other-. wise being like the construction oi any of the several sound boxes common in the art. To the diaphragm 't' is connected the stylus 8 in the usual manner, having a needle Q inserted in the outer end thereof.

As shown in Figs. 1. 3 the sound box is in its operative position having the stylus needle 9 resting in, grooves ot the record 10, which latter is mounted in the usual manner upon theturn table ll. The lever 12 having arms l3 and 14s pivoted. at its intermediate portion 15 to the annular face 6' of the sound hon G. l he arms 13 and i l of the lever are curved to he substantially concentric with the annular :tace oi the sound box, when either one out the some is turned to such a position to be coincident therewith. Attached to the extremity it of the arm 13 is the spiral spring 17 whose opposite extremity 1s attached to the pin 18 on a sound Attached to the extremity of the arm 14, is the yoke arm 21 which taken together with the yoke 22, which is a con tinuation of the arm 1d, form a hearing for the roller 23 which is made of wood or other suitable material that will roll readily over the face of therecord without damaging th same. 1

When the machine is not in operation the sound box may be swungback to rest on the extremity of the sound conveying arm 3in the usual manner and in such position there till being no pressure upon the roller 23 the same will be slightly beyond the stylus point 9, due th the springol l having been relieved from, its tension. min the operation of the .inachine, however t e box is turned down, as shown in Figs. 1 and 3S0 the needle will take its ro record. Owing to the act that the roller 23 is beyond the'iend of the needle it will strike the record first and'the weight of the sound or position upon the on its box and the tension on the spring 17 are counterbalanced. The pressure exerted by theneedle when this counterbalancing ac tion takes place is regulated by the adjustment'of the spring 17, which adjustment is arranged to be a permanent one. When the counterbalancing mechanism is first attached the curvature of the arms and their proper dimensions is also determined to a certain standard.

hile not admitting that there is no inve ion in the exact device illustrated and set forth in the above description, yet I wish it directly understood that a lever of other peculiar configurations together with other types of springs may be utilized so long as the device will erform the. result herein described and W111 be within the construction set forth withinthe appended claims.

pressure of the stylus upon a record.

2. In a sound recordin and reproducing machine, a sound box an means pivoted'to said sound box yieldingly restrained to counterbalance a part of the weight of said sound box to prevent an excess of pressure of the stylus upon a record.

I machine 3. A record, a horizontallyswing-ing arm, a sound box pivotedto the free end thereof, the said sound box carrying a stylus needle and a ivoted spring restrained lever to counter a'lance the excessiveipressure. of the stylus needle on a record.

4. A record, a horizontalliyr swinging arm, a sound box pivoted to the ee en thereof, the said sound box carryin a stylus and being of excessive weight,.an means pivoted to said box to counterbalance the excessive pressure of the styhis needle upon a record.

5. In a sound recording and reproducing machine, the combination with a record of a sound box movable to and from the record, said sound box carrying a" stylus,.a lever fulcrumed at its intermediate portion to said stylus box, and a spring connected to sa d lever to counterbalance the excessive pres sure of the stylusneedle upon therecord.

6. In a sound recording and reproducing the combination with a record of a sound box movable to and from the record, the said sound box carryingha stylus, a lever crumed at. its interme 'ate portion to said sound box and having such a configuration as to conform substantially with the curvature of one of the annular edges thereof, and a spring connected to theupper arm thereof, to counterbalance the excessive pressure of the stylus needle upon the record. I

7. In a sound recording and reproducing machine, the combination with a record of a sound box movable to and from the record, a lever pivoted at its intermediate portion to the annular edge of the sound box the arms of said lever being of such configuration as to conform to the curvature of one of the annular edges of the sound box when said arms coincide with the annular edge thereof, a spring connecting one end of sai lever with the annular edge of the sou box.

8. In a sound recording machine, the combination with a sound box, of a record, and means pivoted to said sound box and resting upon the record to counterbalance a part ofthe Weight of said box to prevent an excessive pressure of the stylus needle upon the record.

9. In a sound recording and reproducing machine, the combination with a sound box,

and reproducing a stylus and a record, of spring actuated a stylus and a' record, of spring actuated means pivoted to said sound box to counterbalance apart of the pressure of the stylus upon the record.

11. In a sound recordingand reproducing machine, the combination of an arm and a sound box secured thereto, the said parts together forming a vertically swinging memher, and spring actuated means pivoted to said member to counterbalance a part'of the pressure of the stylus upon-a record.

12. In a sound recording and reproducing machine, the combination with a sound box,

a stylus and .a record, of spring actuated Y means pivoted to said sound box engaging said record to counterbalance a part of the pressure of the stylus upon the record.

13. In asound recording andreproducing machine, the combination with a sound box carrying a stylus, of pivoted means to counterbalance a part of the weight of said sound box to-prevent an excessive pressure of the stylus upon a record during the operation of the machine.

14. In a sound recording and reproducing machine, the combination with a sound box carrying a stylus, of means pivoted to said sound box counterbalance a part of the weight of said sound box to prevent an excessive pressure of the-stylus upon a record during the operation of the machine.

15. In a sound recording and reproducing machine, the combination with a sound box carrying a stylus, of a record and 'a pivoted lever having a free end restrained to swing in adirection substantially perpendicular 'to' the face of a record to counterbalance a part of the pressure of the stylus'upon the record. I

16. Ina sound recording and reproducing s rinr connected to one end or said lever fulcrurned intermediate its ends to said machine, the combination with a sound box carrying a stylus, ot a .lever pivoted to said sound box and having a free end restrained to swing in a direction substantially perpendicular to the face of a record to counterbalance a part of the pressure of the stylus upon the record.

1?. ln a sound recording and reproducing machine, the combination with a sound box carrying a stylus, olf a record and a lever pivoted intermediate oi its ends, and a the other end of said lever being yielding-1y restrained to swing in a direction substan tially perpendicular to the face of a record.

18. In a sound recording and reproducing machine, the combination with a sound box carrying a stylus, of a record, and means pivoted to swing in a direction substantially perpendicular to the face of the record to prevent an excessive pressure of the stylus upon the record.

19. In a sound recording and reproducing machine, the combination with a sound box carrying a stylus, of a record, andmeans pivoted to swing in a direction substantially perpendicular to the face of a record to prevent the excessive pressure of the stylus upon the record during the operation of the machine.v

20. In a sound recording and reproducing machine, the combination with a record, or" a sound box movable to and from the record, a stylus carried by said sound box, alever sound'box, and a spring connected to the upper arm of said lever, the free end of said levcr being yieldingly restrainechto swing in a direction substantially perpendicular to the face of the recordto prevent an excessive pressure 01'' the stylus upon the record.

21. in a sound recording and reproducing machine, the con'ibination with a record, of a sound box mo *able toward and away from the record, a stylus carried. by saidsound box, and a spring restrained lever pivoted to said sound box and bringing a pressure to bear upon the record when the stylus is in operative engagement therewith to prevent an excessive pressure oi the stylus against the record.

, 22-. l n a. sound recording and reproducing machine, the combination with a record, of a sound box, a stylus carried by said sound box, and a spring restrained pivoted lever bringing a pressure to bear upon the record, when the stylus in operative engagement therewith, to prevent an excessive pressure of the stylus upon the record. w 1

23. lo a sound recording and reproducing n'n'echinc, the combination with a record, oil a sound box movable toward and away from said record, a stylus carried said sound box, a lever pivoted saidsound box, and

a spring connected to said lever to prevent record.

24:. In a sound recording and reproducing" machine, the combination with a record, of a sound box movable to and from the record, a stylus carried by said. sound box, a lever pivoted to one of the faces of said sound box near the periphery, and a spring con-- nected to one end of said lever to prevent an excessive pressure oi the stylus upon the record.

25. In a sound recording and reproducing machine, the combination with means for supporting a stylus, of a lever fulcrumed intermediate of its ends to said means, and a spring connected to said lever to counterbalance the excessive pressure of the stylus upon a record. a

26. In a sound recording and reproducing machine, the combination with means for supporting a stylus, of a lever fulcruined intermediate of its ends to said means,'a roller carried by one end of said lever, and a spring .connected to the other end of said lever to counterbalance the excessive pressure of the stylus upon a record. I

27. In a sound recording and reproducing machine, the combination with means for carrying a stylus, of a lever pivoted to said means, and a spring connected to said lever to prevent an excessive pressure of the stylus upon a record."

28. In a sound recording and reproducing machine, the combination with a record, of

means for carrying a stylus across said rec- 10oord, a lever pivoted to said means and having a portion yieldingly restrained to swing in a direction substantially perpendicular to the face of the record to prevent an excessive pressure of the stylus upop the record.

29. In a sound recording and reproducing machine, the combination with means for carrying a stylus, of means yieldingly restrained to oscillate upon said first mentioned means to prevent an excessive pressure of the stylus upon a record.

' 30. In a sound recording-and reproducing machine, the combination with a stylus bar mounted to oscillate, oi? means mounted to oscillate upon an axis fixed with respect to 1 the axis of oscillation of said bar to prevent an excessive pressure ofthc stylus upon a record.

31. lna sound recording and reproducing machine, the combination with a stylus bar 1 mounted to oscillate, of a. lever mounted upon an axis fixed with respect to the axis oi" oscillation of said bar, and a. spring to re strain the oscillation of said lever to prevent an excessive pressure of the stylus upon a record.

lna sound recording andreproducing machine, the combination with a stylus,

mounted to oscillate, of means mounted to oscillate upon an axis fixed with respect to the axis of' oscillation of the stylus, and; a part of the Weight thereof and to prevent yieldingly restrained to prevent anexcessive an excessive pressure of the stylus upon a pressure of the stylus upon a record.' record.

33. In a sound recording and reproducing In testimony whereof, I have hereunto set 5 machiiae, a sguld box, and nealns mounted my hand this9th day of March, A. 1907. 15

on sai soun ox to counter a ance a art T *1 of the weightthereoi P WILBURN h. DENNIsoN.

'34. In a sound recording and reproducing Witnesses: machine, a sound box, and counterbalancing ALs'roN B. MoULToN, 10 means mounted on said sound box to support ALEXANDER PARK. 

